Three-jaw mechanism with adjustable center height for drilling and clamping steering engine rack
By designing an adjustable center-height three-jaw mechanism, and adopting synchronous oblique hydraulic clamping and servo push rod support, the problems of flexibility and precision in rack clamping were solved, and efficient rack machining was achieved.
Patent Information
- Application Number
- CN202422963780.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-03
AI Technical Summary
In the production of automotive parts, the challenge lies in ensuring flexible clamping and repeatability of racks of different models without affecting processing efficiency, and in accurately adjusting the center height of the rack clamping position.
Design an adjustable center height three-jaw mechanism for drilling and clamping steering gear racks. It adopts synchronous oblique hydraulic clamping from both sides and servo push rods as support. Combined with adjustable push rod assembly and oblique push rod assembly, it realizes the repeatability and flexible adjustment of the three-jaw system.
It achieves high-strength, stable, and highly repeatable rack clamping, meets coaxiality accuracy requirements, and improves processing efficiency and flexible adjustment capability.
Smart Images
Figure CN223531992U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steering system technology, specifically to an adjustable center height three-jaw mechanism for drilling and clamping steering gear racks. Background Technology
[0002] In the manufacturing process of automotive parts, it is necessary to process and tap the bottom holes on both sides of rack-type parts. Since racks of different diameters and different batches of racks will cause deviations in the coaxiality of the holes on both sides, how to ensure the flexibility, clamping strength and repeatability of different rack models, without increasing the frequency of model change and affecting the efficiency, and at the same time, accurately adjust the center height of the rack clamping position has become a pain point of the double-end processing technology. Summary of the Invention
[0003] To overcome the shortcomings of the prior art, this utility model provides an adjustable center height three-jaw mechanism for drilling and clamping steering gear racks. Based on the principle of synchronous oblique hydraulic clamping from both sides and servo push rod as support, it ensures the repeatability and positioning accuracy of the three-jaw system.
[0004] To achieve the above objectives, an adjustable center height three-jaw mechanism for clamping a steering gear rack during drilling is designed, comprising a piston rod cylinder body, a piston rod, a push rod, and a push rod cylinder body. The mechanism is characterized in that: a push rod assembly is provided at the lower part of the piston rod cylinder body; the left and right sides of the push rod assembly are respectively connected to one end of the piston rod, and the other end of the piston rod is connected to an inclined push rod assembly; the inclined push rod assembly includes a left inclined push rod assembly and a right inclined push rod assembly; the push rod assembly, the left inclined push rod assembly, and the right inclined push rod assembly constitute a three-jaw clamping mechanism.
[0005] The push rod assembly includes a support block, a push rod, a push rod guide sleeve, a push rod cylinder, and a bottom cover. The top of the push rod is connected to the support block, the push rod guide sleeve is sleeved on the outside of the push rod, the push rod cylinder is located on the outside of the push rod guide sleeve, and the bottom of the push rod cylinder is connected to the bottom cover with screws.
[0006] The push rod guide sleeve has a cross-shaped structure. Sealing rings are provided between the upper and middle protruding parts of the push rod guide sleeve and the push rod cylinder body, and a nut is connected to the bottom of the push rod guide sleeve.
[0007] The bottom cover is located at the bottom of the push rod cylinder body and is fitted onto the lower outer side of the push rod guide sleeve; sealing rings are provided between the bottom cover and the push rod guide sleeve and between the bottom cover and the push rod cylinder body.
[0008] The bottom of the top rod is connected to the servo motor connecting rod.
[0009] The structure of the left-side inclined push rod assembly is the same as that of the right-side inclined push rod assembly.
[0010] The right-angled push rod assembly includes a piston rod connecting block, an angled push rod, an angled push rod guide sleeve, a pressure block, and a pin. The head of the angled push rod is connected to the pressure block by a pin, and the tail of the angled push rod is connected to the piston rod connecting block by a screw. The piston rod connecting block is connected to the top of the piston rod. An angled push rod guide sleeve is sleeved on the outside of the angled push rod.
[0011] A sealing ring is provided between the inclined push rod guide sleeve and the piston rod cylinder.
[0012] The lower part of the top rod guide sleeve is fitted with a piston rod connector. The left and right sides of the piston rod connector are respectively connected to one end of the piston rod on the left and right sides. The bottom of the piston rod is connected to a nut, and the other end of the piston rod is connected to a piston rod connecting block.
[0013] A top cover is provided at the top of the piston rod cylinder.
[0014] Compared with the prior art, this utility model provides an adjustable center height three-jaw mechanism for drilling and clamping steering gear racks. Based on the principle of synchronous oblique hydraulic clamping from both sides and servo push rod as support, it ensures the repeatability of the three-jaw system. After testing, the structure has high strength, high repeatability in continuous processing, and high adjustable accuracy and good stability of the bottom servo support. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model.
[0016] Figure 2 This is a cross-sectional view of the structure of this utility model.
[0017] Figure 3 This is a schematic diagram of the structural movement of this utility model.
[0018] Figure 4 This is a schematic diagram showing the connection between the structure of this utility model and the servo motor connecting rod. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings.
[0020] like Figure 1 , Figure 2 As shown, a push rod assembly is provided at the lower part of the piston rod cylinder 1. The left and right sides of the push rod assembly are respectively connected to one end of the piston rod 2, and the other end of the piston rod 2 is connected to the inclined push rod assembly. The inclined push rod assembly includes a left inclined push rod assembly and a right inclined push rod assembly. The push rod assembly, the left inclined push rod assembly, and the right inclined push rod assembly form a three-jaw clamping mechanism.
[0021] The push rod assembly includes a support block, a push rod, a push rod guide sleeve, a push rod cylinder body, and a bottom cover. The top of the push rod 4 is connected to the support block 3. The push rod guide sleeve 5 is sleeved on the outside of the push rod 4. The push rod cylinder body 6 is located on the outside of the push rod guide sleeve 5. The bottom of the push rod cylinder body 6 is connected to the bottom cover 7 by screws.
[0022] The push rod guide sleeve 5 has a "+" shaped guide sleeve structure. The upper and middle protruding parts of the push rod guide sleeve 5 are respectively provided with sealing rings between them and the push rod cylinder 6. The bottom of the push rod guide sleeve 5 is connected with a nut.
[0023] The bottom cover 7 is located at the bottom of the push rod cylinder body 6, and the bottom cover 7 is sleeved on the lower outer side of the push rod guide sleeve 5; sealing rings are provided between the bottom cover 7 and the push rod guide sleeve 5 and between the bottom cover 7 and the push rod cylinder body 6.
[0024] The bottom of the push rod 4 is connected to the servo motor connecting rod.
[0025] The structure of the left-side inclined push rod assembly is the same as that of the right-side inclined push rod assembly.
[0026] The right-angled push rod assembly includes a piston rod connecting block, an angled push rod, an angled push rod guide sleeve, a pressure block, and a pin. The head of the angled push rod 13 is connected to the pressure block 15 by a pin 11, and the tail of the angled push rod 13 is connected to the piston rod connecting block 12 by a screw. The piston rod connecting block 12 is connected to the top of the piston rod 2. An angled push rod guide sleeve 14 is sleeved on the outside of the angled push rod 13.
[0027] A sealing ring is provided between the inclined push rod guide sleeve 14 and the piston rod cylinder 1.
[0028] The lower part of the push rod guide sleeve 5 is fitted with a piston rod connector 8. The left and right sides of the piston rod connector 8 are respectively connected to one end of the left and right piston rods 2. The bottom of the piston rod 2 is connected to a nut 9, and the other end of the piston rod 2 is connected to a piston rod connecting block 12.
[0029] A top cover 10 is provided at the top of the piston rod cylinder 1.
[0030] like Figure 3 , Figure 4 As shown, the "bottom claw" in the three-claw system of this utility model adopts a bottom adjustable center height top rod assembly structure. The top rod assembly structure is driven by a motor, thereby driving the top rod 4 and the support block 3. The support block 3 is made of high-strength wear-resistant material and is a vulnerable part that is easy to disassemble and replace. The servo motor drives the connecting rod, which is connected to the top rod 4 through a wedge structure, allowing for precise up-and-down adjustment with a minimum adjustable precision of 10µm. After adjustment, self-locking is achieved by relying on the wedge structure.
[0031] The "two side claws" of the three-jaw system adopt an oblique push rod assembly structure. The oblique push rod 13 of the wedge type applies a pair of oblique downward pressure to the rack, which can better synchronously press the rack 9 and fix the rack 9 from two directions, laterally and longitudinally, so that the rack 9 has good rigidity when it is processed.
[0032] This invention provides a stable structure that solves the problem of the original clamping device being unable to adjust the center height of the rack, increases the flexible adjustment capability of the clamping device, and also meets the coaxiality accuracy requirements of drilling. This structure has been successfully applied in rack production, and the results meet the technical requirements.
Claims
1. An adjustable center-height three-jaw mechanism for clamping a steering gear rack during drilling, comprising a piston rod cylinder, a piston rod, a push rod, and a push rod cylinder, characterized in that: The piston rod cylinder (1) is provided with a push rod assembly at the lower part. The left and right sides of the push rod assembly are respectively connected to one end of the piston rod (2), and the other end of the piston rod (2) is connected to the inclined push rod assembly. The inclined push rod assembly includes a left inclined push rod assembly and a right inclined push rod assembly. The push rod assembly, the left inclined push rod assembly, and the right inclined push rod assembly form a three-jaw clamping mechanism.
2. The adjustable center height three-jaw mechanism for drilling and clamping steering gear racks according to claim 1, characterized in that: The push rod assembly includes a support block, a push rod, a push rod guide sleeve, a push rod cylinder body, and a bottom cover. The top of the push rod (4) is connected to the support block (3), and the push rod guide sleeve (5) is sleeved on the outside of the push rod (4). The push rod cylinder body (6) is provided on the outside of the push rod guide sleeve (5), and the bottom of the push rod cylinder body (6) is connected to the bottom cover (7) by screws.
3. The adjustable center height three-jaw mechanism for drilling and clamping steering gear racks according to claim 2, characterized in that: The push rod guide sleeve (5) has a "+" shaped guide sleeve structure. The upper and middle protruding parts of the push rod guide sleeve (5) are respectively provided with sealing rings between them and the push rod cylinder (6). The bottom of the push rod guide sleeve (5) is connected with a nut.
4. The adjustable center height three-jaw mechanism for drilling and clamping steering gear racks according to claim 2, characterized in that: The bottom cover (7) is located at the bottom of the push rod cylinder body (6), and the bottom cover (7) is sleeved on the lower outer side of the push rod guide sleeve (5); sealing rings are provided between the bottom cover (7) and the push rod guide sleeve (5) and between the bottom cover (7) and the push rod cylinder body (6).
5. The adjustable center height three-jaw mechanism for drilling and clamping a steering gear rack according to claim 2, characterized in that: The bottom of the top rod (4) is connected to the servo motor connecting rod.
6. The adjustable center height three-jaw mechanism for drilling and clamping steering gear racks according to claim 1, characterized in that: The structure of the left-side inclined push rod assembly is the same as that of the right-side inclined push rod assembly.
7. An adjustable center-height three-jaw mechanism for clamping a steering gear rack during drilling, as described in claim 1 or 6, characterized in that: The right-side inclined push rod assembly includes a piston rod connecting block, an inclined push rod, an inclined push rod guide sleeve, a pressure block, and a pin. The head of the inclined push rod (13) is connected to the pressure block (15) by a pin (11), and the tail of the inclined push rod (13) is connected to the piston rod connecting block (12) by a screw. The piston rod connecting block (12) is connected to the top of the piston rod (2). An inclined push rod guide sleeve (14) is sleeved on the outside of the inclined push rod (13).
8. The adjustable center height three-jaw mechanism for drilling and clamping a steering gear rack according to claim 7, characterized in that: A sealing ring is provided between the inclined push rod guide sleeve (14) and the piston rod cylinder (1).
9. The adjustable center height three-jaw mechanism for drilling and clamping a steering gear rack according to claim 2, characterized in that: The lower part of the top rod guide sleeve (5) is fitted with a piston rod connector (8). The left and right sides of the piston rod connector (8) are respectively connected to one end of the piston rod (2) on the left and right sides. The bottom of the piston rod (2) is connected to a nut (9), and the other end of the piston rod (2) is connected to a piston rod connecting block (12).
10. The adjustable center height three-jaw mechanism for drilling and clamping a steering gear rack according to claim 1, characterized in that: A top cover (10) is provided on the top of the piston rod cylinder (1).